Method of making a bag having a filler mouthpiece in one end



Jan. l1, 1949. H. A. WLF 2,458,972

METHOD oF MAKING BAGS HAVING FILLER MOUTHPIEGES IN ons END Filed Dec. 1, 1945 2 SheetS-Shet 1 H. yA. WOLF METHOD OF MAKING BAGS HAVING 'FILLER MOUTHPIECES IN ONE END 2 Sheets-Sheet 2 Jan. 11, 1949.

Filed'Dec. 1, 1945 Patented Jan. 11, 1949 METHOD OF MAKING A BGry HAVING A FILLER MOUTHPIECE 1N ONE END Howard A. Wolf, Philadelphia, Pa., assignor to Elias Wolf, Howard A. Wolf, and Walter L. Wolf, copartners trading as Wolf Brothers,

Philadelphia, Pa.

Application December 1, 1945, Seriall No. 632,176

1 Claim.

This invention relates to the method of making lter bags having a filler mouthpiece secured in the end thereof, adapted to be secured to van outlet from an exhauster of a vacuum cleaner, and for reinforcing a bag mouth.

One of the objects of my invention is the provision of a method for securing a mouthpiece in one end of a bag formed of pervious paper or fabric, adapted to be used in connection with a vacuum cleaner and arranged to receive a nozzle to which the outlet from the exhausting fan extends, the other end of which is closed, so that the air delivered to the bag will lter through the wall of the bag leaving the dust in the bag.

Another object of my invention is the provision of a simple method whereby a relatively strong mouthpiece can readily be secured tothe walls of a tube having parallel sides, or a tube having infolded sides, such as commonly made on machines for making paper bags in a continuous manner.

Another object of my invention is the provision of a method whereby a mouthpiece having infolded sides can be secured to the infolds of an infolded tube, whereby portions of the infolds of the mouthpiece are securely cemented to the inner faces of portions of the infolds of the bag forming tube, while the inner faces of the remaining portions of the infolds of the tube are cemented to portions of the panels overlying the infolds, while the remaining portions of the panels are cemented to the outer faces of the panels of the filling tube, whereby the entire outer face of the filling tube is sealed to one end of the bag, and the inner faces of the infolded portions of the tube beyond the mouthpiece are sealed to each other without cementing any portion of the outer face of the tube in the infolds to an adjacent portion of the tube within the infolds.

Referring to the accompanying drawing in which:

Fig. 1 is a face view partially in section of the open end of one form of bag made in accordance with myA invention;

Fig. 2 is a sectional view on the line 2 2 of Fig. 1;

Fig. 3 is a view showing a portion of Fig. 2, and in which the parts have been greatly enlarged for clearness; f

Fig. 4 is a view similar to Fig. 1 in which a mouthpiece is secured in a tube without infolds;

Fig. 5 is a diagram illustrating one method of assembling the several parts for cementing;

Fig. 6 is a vertical section through the open end of a bag, which is reinforced both internally and externally as on the line 6 6 of Fig. 7 after the former has been removed; and

Fig '7 is a sectional view as on the line 1 7 ofFig. 6 showinga former in position in the assembled members.

^ The nnished bag, whichis formed of pervious paperI stock orfabric, comprises panel portions I0 whichI extend across the entire width of the bag on opposite sides from'an outer fold I2 at one side of the bag to an outer fold I2 at the other side of the bag, and infolded members I4 at each side of the bag which extend from folds I2 to a fold I6 forming thev apex of the infold, and cemented to the inner face of portions of each panel I0 and portions of each 'infolded member Hl` is a filling mouthpiece of impervious material, and when cemented within the pervious tube is substantially the same shape as the pervious tube with the exception of the width of the panels I0' and infolded members I4', which also extend from 'folds I2' to folds t6' yof the mouthpiece.

The inner faces of the central portions of the panels III of the tube are cemented to the outer faces I0 of the mouthpiece, while the outer faces of the infolded members I4 of the filling mouthpiece are cemented to portions of the in ner faces of the infolded members I4 of the tube, and the inner faces of the portions of the panels III of the tube and the inner faces of the portions of the infolds I4 of the tube are cemented to each other from the folds i2 to folds I2' of the mouthpiece.

It will thus be observed that the entire outer face of the mouthpiece is cemented to some portion of the inner face of the tube, while the remaining portions of the inner faces of the tube extending beyond the'mouthpiece are cemented to each other,` whereby the one end of the tube is sealed around the mouthpiece while the portions of the tube beyond the mouthpiece are sealed to eachother.

The other end of the tube may be closed in any manner either before or after securing the 3 mouthpiece in position, so that a filter bag is provided which is sealed at all points except the opening through the mouthpiece.

The various parts are preferably sealed to each other by a band A preferably of impervious paper, extending around the entire outer face of the tube, and is provided with cementitious material on its inner face a, or the face contacting with the tube, and after the mouthpiece is assembled with the tube the parts are pressed into Contact with each other, to cause the sementitious material to pass through the pervious material of the tube, to cement the mouthpiece to the tube and to cement the portions of the tube extending beyond the mouthpiece to each other.

The cementitious material may be either any of the thermal setting cements, glue or any du hesive adapted for cementing bags;

In Fig. 4, I have shown a filter bag made from a plain tube Without infolds and in which the outer face of an impervious mouthpiece B is cemented to portions of the inner faces of the sides C and C' of a pervious tube, while the inner faces of the sides C and C' of the tube extending beyond the mouthpiece are cemented to each other by cement passing from the inner faces of impervious strips D and D through the sides C and C', and which may be assembled and formed as described 'with relation to Fig. 7.

In Figs. 6 and 7, I have illustrated portions of a bag in vwhich the entire open end of a pervious bag is reinforced and is formed by first placing a narrow impervious strip E on a former or support F, then placing the open end of a pervious bag or bag forming tube section as G, over the impervious strip E, and then wrapping a strip H about the tube G over the strip E either or both strips having one side coated with cement, with the cement in contact with the tube G, and

then applying pressure to the assembly to cause the cement to dow throughI the pervious tube from strip to strip, to cause the tube G to be cemented to the adjacent faces of the strips E and H.

The tubes from which the vbags are made as before stated 'are made in a continuous manner, and can readily be 'outto the required length automatically bythe tube forming machine.

These tubes are also made to exact widths, so that the distance between the inner folds AI6 of the infol'ded portions are substantially the same distance apart during the entire run of the machine as the infolds are made over fixed farmers, i

so that the iniolds of each of the blanks of a predetermined size 'are the same distance apart. Both forms of mouthpieces aswell as the tubes E may be made on similar machines and -cut to length and when formed in this manner the inner folds IB of the tubes will .perfectly nest in the inner folds t6 'of the infolded mouthpieces, while the tubes E will perfectly nest in the tubes G.

Various devices may be devised for carrying out the steps of nesting the mouthpiece in an infolded tube, then applying a cement coated strip of impervious material in conta-ct with the outer faces of the infolded members I4 and Ain Contact with the outer faces of lthe panels IS of the tube and then causing the cement to pass through the portions of the tube under the cement vcoated strip to the underlying portions of the mouthpiece and both the portions of the tube beyond the louter folds of the mouthpiece which are in "contact With each other, so that the 'entire inner Ysurface of the tube is cemented to either the'outer face of the panels of the mouthpiece or the overlying portions of the tube to each other, While the outer surfaces of the infolds of the tube will be prevented from contacting with these surfaces due to uncoated back of the imperforate strip A.

In Fig. 5, I have shown one form of apparatus which is of material assistance in assembling the parts, and in which 4'0, 4G designate metallic strips each of a Width to extend from one outer fold l2 at the side Iof one panel lll', to the other outer fold i2 at the other side of the said panel of the mouthpiece, the tube is then placed over the mouthpiece with the infolds thereof nested in the infolds of the mouthpiecewith the inner folds i6 of the tube in contact with the inner folds i6 of the mouthpiece.

Strips A with their coated sides outermost are then bent about positioning blades 42, 42 on each side of the tube, or towards the outer faces of the tube infolds i4, and strips A are also placed on the panels i0 in the same vertical plane as the strips on the blades 42. The blades 42 are then moved towards each, preferably in unison to seat the folded strip A in the inner fold I6 of the mouthpiece, and as the outer folds I2 of the mouthpiece areheld in fixe-d positions by the strips im, the strips A can be tightly forced into the folds. Y

It is immaterial whether the strips A are placed on the panels ill before or after the strips A are seated in the infolds, but after all adhesive strips have been positioned the entire assembly can be pressed together between pneumatic pressing members, as the metal strips 40 may be so mounted as to permit their movement towards each-other.

The interior of the pressing members may be maintained under a predetermined pressure and temperature to cause thermo-setting cement to pass through the pervious tube and set the same, or'dry 'the strip vill 'if moistened to soften cement previously applied to the strips.

'Ii desired the strips may be coated with glue just prior to the placing ofthe strips.

After 'the assembly has been pressed, the cemented assembly is drawn from the strips 48 and 42.

The form shown in Fig. 4 can be formed by inserting the mouthpiece in the open end of *the tube atany desired position, after which adhesive strips A are placed over the outer face of the tube, and 'then pressed between pneumatic pressing members 'as above described.

llt will be evident that variations may be made in the invention without departing from the principles thereof as vdefined in the appended claim.

What I `claim and desire to protect by Letters Patent is:

The method of making a lter bag having an impervious 'tubular filler mouthpiece from a bag and a mouthpiece each having iniolds at its opposite sides and panels exten-ding from side to side of the infol-ds, comprising nesting Within the open end of the bag an open ended tubular mouthpiece having info'ids of less depth 'than 'the infolds of the bag in contact with portions of the inner faces of the panels and portions of the faces of the infolds of the bag, then 'placing a strip of impervious material having 'a cement on one face thereof over the entire 'outer portion of the bag including the infolds at the space desired to Ybe lcemented, and then causing the cement to flow through the flieg, to cement the mouthpiece to portions of the panels and por- 5 tions of the infolds of the bag, and also the inner faces of the portions of the panels of the bag extending beyond the junctions of the panels and infolds of the mouthpiece and the bag to the adjacent portions of the infolds of the bag.

HOWARD A. WOLF.

REFERENCES CITED The following references are of record in the le of this patent:

Great Britain NOV. 14, 1935 

